Sieve-scalper



No Model.) 2 Sheets-Sheet 1.

G. L. JARRETT. SIEVE SUALPER.

No. 511,847. Patented Jan. 2, 1894.

m5 MnuNAL umoeanmma COMPANY,

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(-No Model.) 2 SheetsSheet 2.

G. L. JARRETT. SIEVE SUA'LPER.

Patented Jan. 2, 18,94.

. parts.

Barren dramas Parana triers GEORGE L. JARRETT, OF DES MOINES, IOXVA.

SIEVE-SCALPER.

SPECIFICATION forming part of Letters Patent No. 511,847, dated January 2, 1894.

Application filed February 13, 1893- Serial No. 4623M. (No model.)

To alt whom it may concern:

Be it known that I, GEORGE L. J ARRETT, a citizen of the United States of America, residing at Des Moines, in the county of Polk and State of Iowa, have invented certain new and useful Improvements in Sieve-Scalpers, of which the following is a specification.

The objects of my invention are, first, to provide means for imparting a vibratory motion to the sieves, which means shall be so arranged that either an approximately vertical or longitudinal motion is imparted to the sieves and also that either end portion may be vibrated in either of the aforesaid directions while the other remains stationary.

A further object is to provide a low and compact frame for the machine in which the sieves are placed at such an angle that they may be drawn out without comingin contact with the floor, and the inclined bottom of the machine so arranged that the cloth cleaningbrushes will engage said inclined bottom and preventaccumulations of grain thereupon.

With these objects in view my invention consists, first, in the construction, arrangement and combination of devices with a vibratory, spring-actuated frame and two rotatable shafts whereby an approximately vertical or an approximately longitudinal motion may be imparted to said frame, or either end portion thereof.

My invention consists further in the construction of the frame and the peculiar arrangement of certain common elements therein.

My invention consists further in the construction, arrangement and combination of certain otherportions of the machine as hereinafter fully set forth, pointed out in my claims and illustrated in the accompanying drawings, in which- Figure 1 is a vertical longitudinal sectional view of the frame of the machine and a side view of the vibratory frame therein, portions of which are broken away to show hidden Fig. 2 is a front elevation of the complete machine with portions of the frame broken away to show the interior. Fig. 3 is an enlarged detail side view to show the automatic feed regulating device, the vibrating mechanism and the oil cups and their arrangement relative to each other. Fig. i is an enlarged, detail view showing part of the vibratory frame, one of the cams for vibrating the same and also one of the oil cups and other connective parts. Fig. 5 is an end view of one of the oil cups, and Fig. 6 shows one of the perforated leather strips which form covers for the cups.

Referring to the accompanying drawings the frame of the machine is seen to be composed of the following elements: The sides, ends and top designated by the reference letter A, the containing hoppers at the top of the machine by the reference symbol A the chute A at the forward end of the machine to receive the fine grain that passes through the sieves and the chute A to receive the coarser grain, the hinged doors A to allow the sieves to be removed from the machine, the doors A to provide access to the feed regulating device and the removable sections A to provide access to the vibrating-mechanism-adjusting devices and the inclined bottom A all of which parts are arranged substantially as shown and their functions will be hereinafter described. I

The sieve supporting frame B is constructed with two or more longitudinal partitions B and the opposite sides of each division thus formed, are provided with longitudinal parallel grooves, adapted to admit and retain the sieve sections This sieve supporting frame is disposed within the machine-frame at approximately the same angle as the bottom A and is supported therein in such a manner as to be capable of a vibratory move ment, by means of thefollowing devices:

0. designates a shaft extended transversely through the machine and provided with a belt wheel 0 at one of its ends by means of which power may be applied thereto. At its opposite end is a sprocket wheel 0 which is geared to a like wheel 0 secured to a shaft 0 which latter is extended transversely through the machine at the approximate lower end portion of the frame 13.

O designate metal frames two of which are secured to each side of the frame B one above the shaft 0 and the other above the shaft 0.

D and D are devices pivotally connected with the side of the frame 0 being disposed at an angle approximately forty-five degrees in opposite directions relative to the frame B.

IOC

D is a hub secured to the shaft in proximity to the lower ends of said devices I) and D to be engaged thereby and support the frame B. Means are provided for adjusting the frame B relative to the hubs D comprising the lugs D formed integral with the frames 0 and the set screws D passed through said lugs and adapted to engage the devices D and D ,'and saiddevices D and D are securely held in position by means of the set screws D passed through the slots D into the metal frame 0 To elevate the frame B relative to the hub D the devices D and D are moved downwardly. It will be obvious also that either end of the frame may be adjusted independently of the other.

F designates a yielding pressure device, one of which is located on each side of the machine frame to normally exert its force downwardly upon the sieve supporting frame B.

H designate cams each having a plurality of teeth. Said cams are formed integral with the aforesaid hubs D and located directly beneath the edges of the frame B. The teeth on said cams are adapted to engage the edges of the frame B which are reinforced by means of the edges of the frame C being bent under the frame B. Both end portions of the lower edge of this frame C are inclined downwardly at H for the following purposes: When it is desirable to impart an approximately vertical movement to the sieve supporting frame 13, the said frame is adjusted in such a manner that the cams H will engage the central portion of the under edge of the frame 0 and if it is desirable to impartalo'ngitudinally reciprocating movement to the sieve supporting frame the devices D and D are adjusted in such a manner that the cams will engage either of the inclined surfaces of the under side of the metal frame 0. I have provided means for lubricating the surfaces of these cams and hubs as follows:

J designates a box with a longitudinal partition J and open at its top. J is a strip of some flexible material (preferably leather) perforated at its central portion, passed over the top of said box and adjustably and detachably connected with the ends thereof. One of these strips is placed over each section of said box and the box proper is filled with a suitable lubricant which will come up through said perforations. One of these boxes is placed below each of the combined cam and hub and the flexible top made to conform with the shape thereof.

K designate partitions in the hopper A to divide it into sections corresponding with the size of the various sieves. The bottom of said sections is inclined inwardly and a portion K of one side of the bottom is extended parallel with remaining bottom as clearly shown in Fig. 3 to produce a chute leading to the sieve.

K designate sections hinged to the portions K to be capable of a slight vertical movement to provide a passageway to the sieves. K designate rods secured to the tops of said sections and bent upwardly and then parallel with said sections. K are weights adjustably attached to said rods and so arranged that theymay be shifted upon said rod relative to the gravity center of thesections K and add more or less weight to said sections.

K are vertical strips secured to the sieve to engage the edges of the sections K so that the grain must pass between the strips K and the sections K before reaching the sieves. When it is desirable to allow a comparatively long flow the adjustable weights K are moved upwardly upon the rods K and to restrict the flow they are moved downwardly thereupon to add moreweight to said sections K N designates a shaft extended transversely through the machine near the shaft C N is a sprocket Wheel of comparatively large diameter secured to one end of said shaft and geared to a smaller sprocket wheel N fixed to the shaft 0 by means of the sprocket chain N N are sprocket wheels loosely mounted upon the shaft 0, and N are like sprocket wheels fixed to the shaft 0 directly beneath the sieves. N are sprocket chains passing over said sprocket wheels parallel with the sieves. N are cloth-cleaning brushes fixed to said chains and adapted to engagethe bottom surface of the sieves upon their upward stroke and the inclined bottom A during the downward stroke.

Heretofore sieve scalping machines have ordinarily been constructed with the bottom thereof inclined at an angle sufficient to allow all of the grain passing through the s eve to pass to the forward end of the machine by gravity or else some extraneous device was applied to vibrate said bottom. This it w ll be seen required that the machine be built quite high in order to allow the grain to slide by gravity on the bottom, or unnecessary expense was entailed in providing means for vibrating the said bottom. But in my construction by arranging the bottom in'the path of the cloth-cleaning brushes the accumulations of grain are continually being brushed downwardly and. the machine may be made more compact than has heretofore been done.

The practical operation of the machine is as follows: The material to be sifted is placed in the hoppers at the top of the machine whlch is then set in motion. As the strip K which is attached to the vibrating frame B engages the hinged section K of the hoppers, the material is allowed to flow gradually upon the sieve. This flow may be regulated by the adjustable weight K as set forth. The frame B is vibrated by the teeth of the cams H ongaging the edges thereof and aided by the yielding pressure device F. As before stated the direction of the movement of said frame may be changed by an adjustment of the devices D and D whereby the said cams may be made to engage either the inclined portions of the bottom edges of the frame 0 or the portions thereof that are parallel with the frame. Said cams are kept constantly lubricated without the disadvantage of having oil dropped upon the interior of the machine by the oil cups J and the oil therein protected, from becoming mixed with the dust, &c., arising from the sieves, by the leather covers J The scalping brushes are made to serve the double purpose of engaging the under surface of the sieves and preventing accumulations of matter upon the bottom of the machine and the parts of the machine are so arranged that the sieve may be readily removed through the door A Having thus clearly described the machine, what I claim therein as new, and desire to secure by Letters Patent of the United States, is

1. In a sifting machine the combination of the following elements to wit; a suitable machine frame, a sieve supporting frame vibratorily mounted within said frame, two shafts rotatably mounted beneath the opposite ends of the sieve supporting frame, means for rotating said shafts, a cam fixed to each shaft beneath each edge of the said sieve supporting frame, a hub fixed to each shaft in proximity to the said cams, two devices D and D adjustably attached to the sieve-supporting frame above each of the said hubs and adapted to engage the hubs as set forth, and yielding pressure devices normally exerting their force in a downward direction upon said sieve supporting frame.

2. In a sifting machine the combination of the following elements to wit; a suitable machine frame, a sieve-supporting frame vibratorily mounted within said frame, two shafts rotatably mounted beneath the opposite ends of said sieve supporting frame, means for rotating said shafts, a cam fixed to each shaft beneath each edge of the sieve-supporting frame, a hub fixed to each shaft in proximity to said cams, two devices D and D adjust ably attached to the sieve supporting frame and adapted to engage the hubs as set forth, the inclined surfaces 11 formed on the under edges of the frame in proximity to the said cams for the purposes stated and yielding pressure devices normally exerting their force in a downward direction upon the said sieve-supporting frame.

3. In a sifting machine the combination of the following elements, to wit; a suitable machine frame, a sieve-supporting frame vibratorily mounted within said machine frame, two shafts O and O rotatably mounted beneath the opposite ends of said sieve frame, the combined cams and hubs H and D mounted upon said shafts as set forth, means for rotating said shafts, the metal frames 0 having the lugs D formed thereon and the inclined surfaces l-l formed on their under sides and fixed to the sides of the sieve-supporting frame as set forth, the devices D and D pivotally connected with each of said metal frames, the set screws D whereby said devices D and D may be adjusted, means for fastening the devices D and D in position and the yielding pressure devices F arranged to exert a downward pressure upon the sievesupporting frame.

4:. In a device for vibrating a sieve frame, the combination of the following elements, to wit; a hub and a cam formed integral with each other and fixed to a rotatable shaft, a frame vibratorily mounted above said hub and 'cam, devices fixed to the said frame and resting upon said hub to support the frame, a box fixed to a stationary support directly beneath the said hub and cam, a longitudinal partition in said box and flexible perforated covers extended longitudinally of the different compartments of said box and adapted to engage said hub and cam substantially as and for the purposes stated.

5. An improved sieve scalping machine comprising the following elements in combination, to wit; a suitable supporting frame having the inclined bottom A the door A and the hopper A a sieve supportingframe vibratorily mounted within said frame parallel with the bottom A the shafts C, C and Nextended transversely through the machine beneath the sieve supporting frame, the metal frames C secured to the sides of the sieve supporting frame above the shafts C and O the devices D and D pivotally and adjustably attached to the frame 0 as set forth, the combined hubs and cams fixed to the shafts G and C beneath the devices D and D as set forth, the inclined surfaces H formed on the under edges of the frame C to be placed in engagement with said cam as set forth, means for rotating said shafts, the yielding pressure device F normally exerting its force downwardly upon said frame, the oil cups J having the longitudinal partition J and the flexible perforated covers J 3 adapted to engage said cams and hubs, hinged sections K on the lower end of the hopper, the rods K attached thereto and the weights K adjustably connected with said rods for the purposes stated, the sprocket wheels N fixed to the shaft N, the sprocket wheels N loosely mounted on the shaft 0 and the sprocket chains N connecting them, the scalping brushes N fixed to the sprocket chains N and adapted to engage both the bottom of the sieve and the frame bottom A for the purposes stated, all arranged and combined substantially as set forth.

GEORGE L. JARRETT.

IVitnesses:

GARDNER V. WRIGHT, THOMAS G. ORWIG. 

